ec04e4f638
Signed-off-by: Derek McGowan <derek@mcg.dev> Signed-off-by: Derek McGowan <derek@mcg.dev>
129 lines
3.1 KiB
Go
129 lines
3.1 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package proxy
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import (
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"context"
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"errors"
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"fmt"
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"io"
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streamingapi "github.com/containerd/containerd/api/services/streaming/v1"
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"github.com/containerd/containerd/v2/core/streaming"
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"github.com/containerd/containerd/v2/pkg/protobuf"
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"github.com/containerd/errdefs"
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"github.com/containerd/ttrpc"
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"github.com/containerd/typeurl/v2"
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"google.golang.org/grpc"
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)
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// NewStreamCreator returns a new stream creator which can communicate over a GRPC
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// or TTRPC connection using the containerd streaming API.
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func NewStreamCreator(client any) streaming.StreamCreator {
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switch c := client.(type) {
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case streamingapi.StreamingClient:
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return &streamCreator{
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client: convertClient{c},
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}
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case grpc.ClientConnInterface:
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return &streamCreator{
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client: convertClient{streamingapi.NewStreamingClient(c)},
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}
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case streamingapi.TTRPCStreamingClient:
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return &streamCreator{
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client: c,
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}
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case *ttrpc.Client:
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return &streamCreator{
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client: streamingapi.NewTTRPCStreamingClient(c),
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}
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case streaming.StreamCreator:
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return c
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default:
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panic(fmt.Errorf("unsupported stream client %T: %w", client, errdefs.ErrNotImplemented))
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}
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}
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type convertClient struct {
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streamingapi.StreamingClient
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}
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func (c convertClient) Stream(ctx context.Context) (streamingapi.TTRPCStreaming_StreamClient, error) {
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return c.StreamingClient.Stream(ctx)
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}
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type streamCreator struct {
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client streamingapi.TTRPCStreamingClient
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}
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func (sc *streamCreator) Create(ctx context.Context, id string) (streaming.Stream, error) {
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stream, err := sc.client.Stream(ctx)
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if err != nil {
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return nil, err
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}
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a, err := typeurl.MarshalAny(&streamingapi.StreamInit{
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ID: id,
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})
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if err != nil {
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return nil, err
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}
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err = stream.Send(protobuf.FromAny(a))
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if err != nil {
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if !errors.Is(err, io.EOF) {
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err = errdefs.FromGRPC(err)
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}
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return nil, err
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}
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// Receive an ack that stream is init and ready
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if _, err = stream.Recv(); err != nil {
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if !errors.Is(err, io.EOF) {
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err = errdefs.FromGRPC(err)
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}
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return nil, err
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}
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return &clientStream{
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s: stream,
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}, nil
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}
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type clientStream struct {
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s streamingapi.TTRPCStreaming_StreamClient
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}
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func (cs *clientStream) Send(a typeurl.Any) (err error) {
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err = cs.s.Send(protobuf.FromAny(a))
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if !errors.Is(err, io.EOF) {
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err = errdefs.FromGRPC(err)
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}
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return
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}
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func (cs *clientStream) Recv() (a typeurl.Any, err error) {
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a, err = cs.s.Recv()
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if !errors.Is(err, io.EOF) {
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err = errdefs.FromGRPC(err)
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}
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return
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}
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func (cs *clientStream) Close() error {
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return cs.s.CloseSend()
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}
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